Alarm-clock.



W. DUPEN, SE. a W. DUPEN, In.

ALARM CLOCK.

APPLIOATION FILED KAY 25, 1908.

Patented MLr.16,19O9

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APPLICATION FILED MAY 25, 1908.

Patented Mar. 16, 1909.

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UNITED STATES-EXTENT OFFICE.

WILLIAM DUPEN, SE, OF CHICO, AND WILLIAM DUPEN, JR, OF SACRAMENTO,

CALIFORNIA.

ALARM-CLOCK.

Specification of Letters Patent.

AppIication filed May 25, 1908.

Patented March 16, 1909.

Serial No. 434,860.

To all whom it may concern:

Be it known that we, WILLIAM DUPEN, Sr., a citizen of the United States,residing at Chico, Butte county, California, and WILLIAM DUPEN Jr., acitizen of the United States, residing at Sacramento, in the county ofSacramento and State of California, have invented certain new and usefulIm rovements in Alarm-Clocks; and we do eclare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

Our invention relates to clock movements, and more especially to that tye which require winding only once in eig 1t days, and which haveprovision for sounding an alarm at given periods. Heretofore, in devicesof this character, although the chronometer was wound onl once duringthe eight days, the alarm mec anism had to be wound for each successivealarm striking twice during each day.

It is the object of our invention to avoid these difficulties and toprovide a clock which will strike its alarm only once a day, althoughbeing completely operative for eight consecutive days without furtherwinding.

Another object of the invention is to provide a clock of this characterwhich will be efiicient in operation, practical for all puroses, andcomparatively cheap to manuacture.

Further objects will appear as the following specific description isread in connection with the accompanying drawings forming part of thisspecification, and in which,

Figure 1 is a face view of the clock; Fig. 2 is a front elevation of themechanism with the dial removed; Fig. 3 is a detail sectional view onthe line 33 of Fig. 2, showing the twenty-four-hour vheel in oneposition; Fig. 4 is a similar view showing the twentyfour-hour wheel-inits other position; Fig. 5 is a side elevation of the mechanism removedfrom the case and with certain unnecessary parts removed; Fig. 6 is afragmentary sectional view taken on the line rx of Fig. 5 Fig. 7 is anenlarged view of certain connected parts of the alarm mechanism; andFig. 8 1s a similar view to Fig. 6, showing the locked position of thecam disk.

Referring more especially to the drawings,

1 represents the casing of the clock, which is provided with the usualglass front, 2, and an indicating dial, 3, secured to the front plate,4, of the mechanism in any suitable manner. The front plate, 4, isspaced from the rear plate, 5, and an intermediate mounting plate, 6, byposts, 7. All the foregoing is found in any ordinary clock and needs nofurther specific description. The usual eight-day clock train is alsocarried by the frame, and only parts which cooperate with the alarmmechanism have been here illustrated, such as the main gear wheel, 8,the fly-wheel, 9, the minute arbor, 10, the hour gear, 11, and itsassociated gear, 12, which drives it.

Journaled in the plates 4 and 5 is a shaft, 13, upon which there issecured a ratchet wheel, 14, adapted to be engaged by the pawl, 15,carried upon the main alarm gear, 16, which is loosely carried by theshaft. A s ring, 17, having one end attached to the s aft, 13, and itsother end secured to one of the spacing posts, 7, is wound in the usualmanner by attaching a key to the threaded end, 18, of the shaft, 13.Loosely mounted upon the shaft, 13, is a sleeve, 19, carrying a disk,20, which is provided with a pair of diametrically opposite cams, 21,inchned in opposite directions so as to present a cam face to thereleasing lever, 22, at each half revolution of the disk. A slot, 23, isprovidedin the disk adj acent its periphery which is adapted to receivea pin, 24, carried by the gear wheel, 16, and this pin is normally keptin one end of the slot by a spring, 25, carried by the disk, 20, for apurpose which will hereinafter be described.

Keyed to the arbor 10 is a pinion, 26, which meshes with the gear 12 andthereby drives the hour gear, 11, in the usual manner. Meshing with thishour gear is a gear, 27, which we shall herein term the twentyfour-hourgear, as it is twice as large as the gear 11 and being in mesh therewithonly makes a complete revolution once every twenty-four hours. This gearis mounted u on a shaft, 28, to which is attached the a arm indicatinghand, 29, and the alarm setting nut, 30. Below the dial and adjacent thewheel, 27, we secure to the shaft 28 an annular ring, 31, having aprojecting lug, 32, adapted to be engaged by a cam-shaped collar, 33,carried by the gear, 27. Underneath the gear 27 we secure to the shaft aconical sleeve, 34, against which bears a leaf spring, 35, which isadapted to normally force the cam collar, the conical collar and thegear upwardly. Projecting at right-angles to the releasing lever 22 onthe shaft 36 is a stop lever, 37 which rojects into the path of the arm,38 carried y the escapement pawl, 39.- The arm 37 has an upwardlyprojecting stud, 40, which is engaged. with a swinginglever, 41, pivotedto the frame plate 4, and provided with a projection, 42, adapted to engage the conical sleeve, 34, so that the-swinging lever 41 is moved awayand into engagement with the arm 37 so as to release the arm 22 from thecam, 21, with which it is in engagement. The arm 37 and the arm 22 arenormally held in engagement with the swinging lever 41 and disk, 20,respectively, by a spring, 37 carried by the frame plate, 4.

Motion is conveyed to the escapement wheel, 43, by means of a pinion 44in mesh with the gear, 16, and secured to an arbor 45 upon which thereis mounted a gear, 46, adapted to engage the pinion, 47, carried uponthe escapement wheel shaft, 48.

To set the device for a given time, the setting nut 30 is turned, whichrevolves the shaft 28 and thereby sets the hand, 29 to the properposition and also moves the collar 31 with its projecting lug, 32, overthe cam, 33. i After an alarm has been set for a given time, and thespring, 17, wound up, the operation is as follows: The hour gearrevolving continuously, moves the twenty-four-hour gear in the oppositedirection, and the cam collar slides around underneath the lug 32 untilthe end of the cam is reached, when the spring 35 will force the wheelupwardly, thus releasing the swinging lever 41 and allowing the spring37 a to force the arm, 37, with its connected stud, 40, out of the pathof escapement lever, 38. At this time the arm 22 has dropped against thecam disk 20, ahead of one of the cams, 21, and the spring 17 has startedthe wheel 16 which causes the escapement mechanism to operate. "10prevent the arm 22 from dropping again into engagement with the cam whenreleased, we provide the spring, 25, which abuts against the pin, 24,and carries the cam which has been in engagement with the arm 22 out ofalinement with its contact finger, and when the arm 22 is allowed todrop, it falls upon the smooth periphery of the disk, intermediate thecams.

fhen the opposite cam comes into engagement with the contact finger ofthe operating rod, 22, it is held stationary by this rod until the pin24 reaches the opposite end of the slot 23, at which time the pressureof the spring, 17, will be exerted and the cam 21 will throw the arm 22outwardly, thus moving its connected arm, 37, into engagement with theescapement arm, 38. The parts are held in this position until theswinging lever 41 days only, and only give an alarm once in everytwenty-four hours.

From the foregoing description, taken in connection with theaccompanying drawings, the constructlon and operation of the inventionwill be readily understood without requiring a more extendedexplanation.

Various changes in the form, proportion and the minor details ofconstruction may be resorted to without departing from the principle orsacrificing any of the advantages of the invention as defined in theappended claims.

Having thus described our invention, what we claim as new and desire tosecure by Letters-Patent, is:

1. In a device of the class described, a chronometer mechanismcomprising in part a gear connected to the hour arbor of said mechanism,an alarm escapement with means for driving the same, an arm thereon,means comprising in part a ear meshing with the hour gear for controling said escapement whereby it is operated only once in a day, a springcontrolled cam wheel for determining the length of operation of saidalarm escapement and means controlled by said cam wheel for contactingwith said arm and holding the escapement inoperative.

2. In a device of the class described, a chronometer mechanism, meansfor driving the same, an alarm escapement with means for driving thesame, an arm rigid thereon, means controlled by the chronometermechanism for controlling said escapement, whereby it is operated onceonly in a day, a spring controlled cam wheel to determine the length ofoperation of the alarm escapement and a tripping device operated by thecam wheel to engage said arm to stop the escapement.

3. In a device of the class described, a chronometer mechanism, meansfor driving the same, an alarm mechanism including an escapement, meansfor driving the same intermittently for a plurality of days, an armrigid. on the escapement of said alarm mechanism, a limiting armconnected to the escapement, means controlled by the chronometer forliberating said arm once every twenty-four hours, whereby an alarm issounded, a spring started cam wheel to determine the length of operationof said alarm mechanism, and a tripping device operated by said camwheel to engage said arm and hold the escapement.

4. In a device of the class described, the combination with achronometer mechanism, an alarm escapement, an arm vibrating therewith,means for driving the same intersetting the alarm esca ement todetermine mittently for a plurality of days, means for set our hands inthe presence of subscribing Witnesses.

WILLIAM DUPEN, SR. WILLIAM DUPEN, JR.

WVitnesses as to the signature of William Dupen, S12:

CHESTER COLE, SAMUEL MELINE.

the time the alarm shal be given, means controlled by the chronometermechanism and co-acting With the setting means to release the escapementat a predetermined time, said last-named means acting once a day, aspring started cam Wheel to determine the l length of operation of saidalarm escapement, and a lever operated by the cam lVitnesses as to thesignature of William Wheel for engaging said arm to stop the es- JDupen, J11: capement. BERTHOLD M. NYE,

In testimony whereof we have hereunto l AUGUSTUS BISHOP.

